HP 8920A - Accessing the Call Processing Subsystem’s Screens; Call Processing Subsystem’s Screens

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Chapter 6, Call Processing Subsystem
Description of the Call Processing Subsystem
Accessing the Call Processing Subsystem’s Screens
The Call Processing Subsystem screens are accessed by selecting CALL CNTL
from the
To Screen menu on the Test Set’s CRT (you may have to choose the
More choice to display the CALL CNTL choice).
Option 004:Tone/Digital Signalling is required in an HP 8920A in order to use the Call
Processing Subsystem. Attempting to access the Call Processing Subsystem without
Option 004 installed will generate an “Option not installed.” error.
Call Processing Subsystem’s Screens
The Call Processing Subsystem consists of six screens.
five
• The CALL CONTROL is the primary Call Processing Subsystem screen. This screen
contains the fields used to configure the Test Set’s parameters such as SAT Tone fre-
quency, control channel number, and system identification number. Call processing
functions such as registration, page, and handoff can be activated from this screen. The
transmit power of the mobile station can be set from this screen. Data messages re-
ceived from the mobile station are displayed on this screen.
• The CALL DATA screen displays the decoded signaling messages received from the
mobile station on the reverse control channel and the reverse voice channel. Call pro-
cessing functions such as registration, page, and handoff can also be activated from this
screen. The transmit power of the mobile station can be set from this screen.
• The CALL BIT screen allows the advanced user to modify the contents of the forward
control channel and forward voice channel messages.
• The CALL CONFIGURE screen contains the fields used to configure various parame-
ters related to the Call Processing Subsystem, such as CMAX, Detector, and Input
Att.
The ANALOG MEAS screen is used to make analog RF and audio measurements on the
mobile station while a link is active.
AUTHENTICATION screen allows the user to turn on the AMPS authentication process
(IS-54) during call processing functions. Various fields contained on this screen allow the
advanced user to select new RAND_A, RAND_B, RandSSD and RAND_U values for trans-
mission to the mobile station. The user can also select the number of times the system
parameter overhead message is sent to the mobile station. AMPS Call Processing functions
can be tested with or without authentication active.
Call Processing functions with Authentication are only supported for AMPS system types
(IS-54).